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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMEOS_ASH_COMPONENTS_KIOSK_VISION_INTERNALS_PAGE_PROCESSOR_H_
#define CHROMEOS_ASH_COMPONENTS_KIOSK_VISION_INTERNALS_PAGE_PROCESSOR_H_
#include "base/component_export.h"
#include "base/feature_list.h"
#include "base/observer_list.h"
#include "base/observer_list_types.h"
#include "chromeos/ash/components/kiosk/vision/internal/detection_processor.h"
#include "chromeos/ash/components/kiosk/vision/webui/kiosk_vision_internals.mojom-forward.h"
#include "chromeos/ash/components/kiosk/vision/webui/kiosk_vision_internals.mojom.h"
#include "media/capture/video/chromeos/mojom/cros_camera_service.mojom-forward.h"
namespace ash::kiosk_vision {
// Forwards detections to instances of the chrome://kiosk-vision-internals page
// `UIController` via the `Observer` interface.
//
// Used to aid in evaluating the Kiosk Vision feature during development.
class COMPONENT_EXPORT(KIOSK_VISION) InternalsPageProcessor
: public DetectionProcessor {
public:
InternalsPageProcessor();
InternalsPageProcessor(const InternalsPageProcessor&) = delete;
InternalsPageProcessor& operator=(const InternalsPageProcessor&) = delete;
~InternalsPageProcessor() override;
// Observer for `State` updates. Intended to be implemented under the
// `UIController` for chrome://kiosk-vision-internals.
class Observer : public base::CheckedObserver {
public:
virtual void OnStateChange(const mojom::State& new_state) = 0;
};
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
private:
// `DetectionProcessor` implementation.
void OnFrameProcessed(
const cros::mojom::KioskVisionDetection& detection) override;
void OnTrackCompleted(const cros::mojom::KioskVisionTrack& track) override;
void OnError(cros::mojom::KioskVisionError error) override;
// Calls `Observer::OnStateChange` with `new_state` on all `observers_`.
void NotifyStateChange(mojom::StatePtr new_state);
// The last state emitted to `Observer::OnStateChange`.
mojom::StatePtr last_state_;
base::ObserverList<Observer, /*check_empty=*/true, /*allow_reentrancy=*/false>
observers_;
};
COMPONENT_EXPORT(KIOSK_VISION)
BASE_DECLARE_FEATURE(kEnableKioskVisionInternalsPage);
bool COMPONENT_EXPORT(KIOSK_VISION) IsInternalsPageEnabled();
} // namespace ash::kiosk_vision
#endif // CHROMEOS_ASH_COMPONENTS_KIOSK_VISION_INTERNALS_PAGE_PROCESSOR_H_
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